COVID has had many far reaching impacts. Is it possible that one of those impacts is the quality of our weather forecasts?
Grounded aircraft could make weather forecasts less reliable - https://phys.org/news/2020-05-grounded-aircraft-weather-reliable.html
The WMO AMDAR Observing System - https://community.wmo.int/activity-areas/aircraft-based-observations/amdar
Drop in aircraft observations could have impact on weather forecasts - https://www.ecmwf.int/en/about/media-centre/news/2020/drop-aircraft-observations-could-have-impact-weather-forecasts